Seems that this comes from Maxima. Look at this sage: fu=maxima(k6).fullratsimp().sage();fu -12*(3*(28960879780288*sqrt(2) + 49414857768735)*sqrt(3) - 150485145634059*sqrt(2) - 256767132912716)/(3*(40774373203317*sqrt(2) - 90564557902141)*sqrt(3) - 211869858104760*sqrt(2) + 470587246954565) sage: N(fu) 6.00000000000000 sage: N(k6) 139.406088405362 sage: tr=maxima(k6).trigrat().sage();tr 9*(sqrt(2) + 2)*sqrt(3) + 27*sqrt(2) + 48 sage: N(tr) 139.406088405362
Tested on Sage 4.3. and wxmaxima 0.8. Before reporting as Maxima bug, it would be nice to ask, if this is known problem and construct minimal example. Robert btw: in Maxima A:-18*(3*sqrt(2)+5)/(-4*(2*sqrt(3)-3)/(3^(3/2)-5)-(-8*(sqrt(3)-1)/(3^ (3/2)-5)+2*(4*(sqrt(3)-2)/(3^(3/2)-5)-1)*(5*sqrt(2)*(sqrt(3)-1)/(3^ (3/2)-5)-sqrt(2))/(5*sqrt(2)*(sqrt(3)-2)/(3^(3/2)-5)-2^(3/2)+3)+1)* ((sqrt(3)-2)*(5*sqrt(2)*(2*sqrt(3)-3)/(3^(3/2)-5)+3*2^(3/2)-9)/((5*sqrt (2)*(sqrt(3)-2)/(3^(3/2)-5)-2^(3/2)+3)*(3^(3/2)-5))-(2*sqrt(3)-3)/(3^ (3/2)-5))/(2*(sqrt(3)-2)*(5*sqrt(2)*(sqrt(3)-1)/(3^(3/2)-5)-sqrt(2))/ ((5*sqrt(2)*(sqrt(3)-2)/(3^(3/2)-5)-2^(3/2)+3)*(3^(3/2)-5))-2*(sqrt (3)-1)/(3^(3/2)-5)+1)+(4*(sqrt(3)-2)/(3^(3/2)-5)-1)*(5*sqrt(2)*(2*sqrt (3)-3)/(3^(3/2)-5)+3*2^(3/2)-9)/(5*sqrt(2)*(sqrt(3)-2)/(3^(3/2)-5)-2^ (3/2)+3)-3); A,numer; ---- this gives 139..... b:radcan(A); b,numer; ----- this gives 16 b:xthru(A) c:radcan(b) c,numer ------ this gives 139 b:trigrat(A) b,numer ------- gives 139 On 10 pro, 00:40, mhampton <hampto...@gmail.com> wrote: > I was trying to simplify a somewhat complicated expression involving > two square roots, and seem to have found bugs in how sage parses > things from sympy and maxima. At least, Ondrej checked and sympy > handles things fine, the answer gets corrupted somehow in sage. I > suspect the same is true for maxima but I haven't checked. > > A worksheet with the expression in question is at: > > http://sagenb.org/home/pub/1232/ > > Before filiing a ticket I am wondering if this is a known problem at > all. > > -Marshall -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
